Stackable chair with rounded back



FIG. 1 is a perspective view of the design taken from above and showing the right side thereof;

FIG. 2 is a front view of the design;

FIG. 3 is a back view of the design;

FIG. 4 is a top view of the design; and,

FIG. 5 is a right side view of the design, the left side view being a mirror image of the right side. 

The ornamental design for a stackable chair with rounded back, as shown and described. 